I recently purchased a used CADE tank from someone getting out of the hobby. My question is, will removing the secondary back glass( that serves to make the overflow section and the topoff water section) affect the structure of the tank and cause it to fail… point to note the actual back glass is 10mm thick and front and sides are 12mm. The tank dimensions are about 47inch long 27 front to back and 22 high… im just wondering if a 10mm thick back glass is adequate for a tank that size. Also the back glass has a small chip at the bottom … see pics for chip and the location of where the secondary back glass was( there is silicone residue where i removed this secondary back)